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“非遗”情境下分析化学实验项目式教学——传统米醋的酿造、分析与评价

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化学教育（中英文） 2024年第12期45卷 25-35页

作者：孙欢汪莉王素琴姜建文黎泓波江西师范大学化学化工学院化学国家级实验教学示范中心江西南昌330022

以非物质文化遗产——醋的酿制技艺搭建教学情境,让学生亲身体验酿醋并通过酸碱滴定法测定自酿米醋中的总酸含量,使用现代传感技术改进传统滴定实验装置获取滴定曲线。再引导学生设计电导滴定实验方案,最后从色香味等感官层面评估自酿... 详细信息

以非物质文化遗产——醋的酿制技艺搭建教学情境,让学生亲身体验酿醋并通过酸碱滴定法测定自酿米醋中的总酸含量,使用现代传感技术改进传统滴定实验装置获取滴定曲线。再引导学生设计电导滴定实验方案,最后从色香味等感官层面评估自酿米醋的优劣,学习气质联用技术定性分析化合物的方法。整个教学过程由浅入深,前后相互联系,实现了分析化学项目式实验教学。

关键词：分析化学实验非遗项目式教学酸碱滴定法手持技术

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非晶态氢氧化镍基无酶葡萄糖电化学传感器

广州化工 2024年第2期52卷 54-57,82页

作者：李红波赵鹏中国工程物理研究院核物理与化学研究所四川绵阳621999

基于过渡金属(氢)氧化物葡萄糖电化学传感器具有成本低、体积小、灵敏度高、线性检测范围宽等优点,通过一种新型电化学阴极沉积法构建了一种新型非晶态Ni(OH)_(2)无酶葡萄糖传感器,该传感器对葡萄糖的检测展现了优异的电化学活性:检测... 详细信息

基于过渡金属(氢)氧化物葡萄糖电化学传感器具有成本低、体积小、灵敏度高、线性检测范围宽等优点,通过一种新型电化学阴极沉积法构建了一种新型非晶态Ni(OH)_(2)无酶葡萄糖传感器,该传感器对葡萄糖的检测展现了优异的电化学活性:检测灵敏度高达4022μA·L·mmol^(-1)·cm^(-2),线性响应范围0.25μmol/L~1 mmol/L,检出下限低至70 nmol/L,抗干扰能力强,在0.5 mol/L NaOH溶液中具有优异的稳定性与选择性。

关键词：非晶态氢氧化镍葡萄糖电化学传感器

Model parameters estimation of aero-engine based on hybrid optimization algorithm

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航空动力学报 2011年第7期26卷 1665-1671页

作者： li Qiu-hong li Ye-bo JIANG Dian-wen (College of Energy and Power EngineeringNanjing University of Aeronautics and Astronautics Nanjing 210016 China

A hybrid optimization algorithm for the time-domain identification of multivariable,state space model for aero-engine was presented in this *** optimization procedure runs particle swarm optimization(PSO) and least squares optimization(LSO) "in series".PSO starts from an initial population and searches for the optimum solution by updating ***,it can sometimes run into a suboptimal *** LSO can start from the suboptimal solution of PSO,and get an optimum solution by conjugate gradient *** algorithm is suitable for the high-order multivariable system which has many parameters to be estimated in wide *** optimization algorithm is applied to estimate the parameters of a 4-input 4-output state variable model(SVM) for *** simulation results demonstrate the effectiveness of the proposed algorithm.

关键词： aero-engine state variable model(SVM) particle swarm optimization(PSO) least squares optimization(LSO) hybrid optimization algorithm

A Note on Discrete Connections on Regular Lattice

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Communications in Theoretical Physics 2008年第6期49卷 1607-1610页

作者： XIE Zheng li hong-bo Key Laboratory of Mathematics Mechanization Academy of Mathematics and System Science the Chinese Academy ofSciences Beijing 100080 China

Applying the systematic method about how to get the discrete counterparts of continuous system given by K. Wu et al., we define the discrete analogue of Ehresmann connections, Cartan connections, and affine connection... 详细信息

关键词： discrete connections discrete curvature plaquette variable noncommutative calculus

Contribution of Root Proliferation in Nutrient-Rich Soil Patches to Nutrient Uptake and Growth of Maize

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Pedosphere 2012年第6期22卷 776-784页

作者： li hong-bo ZHANG Fu-Suo SHEN Jian-bo Department of Plant Nutrition China Agricultural UniversityKey Laboratory of Plant-Soil InteractionsMinistry of EducationBeijing 100193(China)

Root proliferation can be stimulated in a heterogeneous nutrient patch; however, the functions of the root proliferation in the nutrient-rich soil patches are not fully understood. In the present study, a two-year field experiment was conducted to examine the comparative effects of localized application of ammonium and phosphorus (P) at early or late stages on root growth, nutrient uptake, and biomass of maize (Zea mays L.) on a calcareous soil in an intensive farming system. Localized supply of ammonium and P had a more evident effect on shoot and root growth, and especially stimulated fine root development at the early seedling stage, with most of the maize roots being allocated to the nutrient-rich patch in the topsoil. Although localized ammonium and P supply at the late stage also enhanced the fine root growth, the plant roots in the patch accounted for a low proportion of the whole maize roots in the topsoil at the flowering stage. Compared with the early stage, fine root length in the short-lived nutrient patch decreased by 44%-62% and the shoot dry weight was not different between heterogeneous and homogeneous nutrient supply at the late growth stage. Localized supply of ammonium and P significantly increased N and P accumulation by maize at 35 and 47 days after sowing (DAS); however, no significant difference was found among the treatments at 82 DAS and the later growth stages. The increased nutrient uptake and plant growth was related to the higher proportion of root length in the localized nutrient-enriched patch. The results indicated that root proliferation in nutrient patches contributed more to maize growth and nutrient uptake at the early than late stages.

关键词： biomass growth stage intensive farming system localized nutrient supply root length

Diversity and Characterization of Potential H_2-Dependent Fe(Ⅲ)-Reducing Bacteria in Paddy Soils

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Pedosphere 2012年第5期22卷 673-680页

作者： li Hui-Juan PENG Jing-Jing li hong-bo Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021(China) Graduate University of Chinese Academy of Sciences Beijing 100059(China)

Microbial ferric iron reduction, with organic carbon or hydrogen as the electron donor, is one of the most important biogeochemical processes in anoxic paddy soils; however, the diversity and community structure of hydrogen-dependent dissimilatory iron-reducers remain unknown. Potential H2-dependent Fe（III）-reducing bacteria in paddy soils were explored using enrichment cultures with ferrihydrite or goethite as the electron acceptor and hydrogen as the electron donor. Terminal restriction fragment length polymorphism （T-RFLP） analysis and cloning/sequencing were conducted to reveal bacterial community structure. Results showed that Geobacter and Clost^dium were the dominant bacteria in the enrichment cultures. Fe（III） oxide mineral phases showed a strong effect on the community structure; Geobaeter and Clostridium were dominant in the ferrihydrite treatment, while Glostridium spp. were dominant in the goethite treatment. These suggested that H2-dependent Fe（liI）-redueing bacteria might be widely distributed in paddy soils and that besides Geobacter, Clostmdium spp. might also be an important group of H2-dependent Fe（III）-reducing microorganisms.

关键词： bacterial community structure Clostridium enrichment culture Geobaeter , terminal restriction fragment length poly-morphism

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碳化硅微结构超声辅助磨削试验研究

机械设计与制造 2024年第7期 178-182页

作者：李红博陈涛段振岩张益文武汉理工大学机电工程学院湖北武汉430070

为了提高无压烧结碳化硅微结构加工质量,开展了普通磨削和超声辅助磨削对比试验,探究了工艺参数对加工质量的影响规律。结果表明,加工过程磨削力、表面粗糙度及棱边圆弧半径均随主轴转速的提高而降低、随进给速度的提升而增大,且进给速... 详细信息

为了提高无压烧结碳化硅微结构加工质量,开展了普通磨削和超声辅助磨削对比试验,探究了工艺参数对加工质量的影响规律。结果表明,加工过程磨削力、表面粗糙度及棱边圆弧半径均随主轴转速的提高而降低、随进给速度的提升而增大,且进给速度对磨削力的影响远大于主轴转速,但对于表面粗糙度和棱边圆弧半径,两工艺参数对其影响程度类似;超声振动可有效降低磨削力、表面粗糙度和棱边圆弧半径,降幅分别为(9.4~34.6)%、(12.9~28.9)%、(4.8~16.3)%;加工表面微观形貌表明,材料在加工过程中塑性去除行为与脆性去除行为并存,超声辅助磨削更易实现塑性去除,故所得加工质量较好。

关键词：碳化硅微结构超声辅助磨削磨削力加工质量

五灵胶囊联合富马酸丙酚替诺福韦片对慢性乙型肝炎患者氧化应激、CD4^(+)CD25^(+)调节性T细胞和血清MMP-1、MMP-2、TIMP-1的影响

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现代生物医学进展 2024年第3期24卷 591-595页

作者：李洪波李明刘义安李小红俞嵩苏州大学附属传染病医院(苏州市第五人民医院)肝病科江苏苏州215505 南京中医药大学苏州附属医院(苏州市中医医院)消化科江苏苏州215007

目的:探讨五灵胶囊联合富马酸丙酚替诺福韦片对慢性乙型肝炎(CHB)患者氧化应激、CD4^(+)CD25^(+)调节性T细胞和血清基质金属蛋白酶-1(MMP-1)、基质金属蛋白酶-2(MMP-2)、基质金属蛋白酶组织抑制因子-1(TIMP-1)的影响。方法:纳入苏州大... 详细信息

目的:探讨五灵胶囊联合富马酸丙酚替诺福韦片对慢性乙型肝炎(CHB)患者氧化应激、CD4^(+)CD25^(+)调节性T细胞和血清基质金属蛋白酶-1(MMP-1)、基质金属蛋白酶-2(MMP-2)、基质金属蛋白酶组织抑制因子-1(TIMP-1)的影响。方法:纳入苏州大学附属传染病医院2021年6月~2022年12月期间收治的CHB患者122例,采用随机数字表法分为对照组(n=61,富马酸丙酚替诺福韦片)和研究组(n=61,五灵胶囊联合富马酸丙酚替诺福韦片)。对比两组疗效、氧化应激指标、CD4^(+)CD25^(+)调节性T细胞、肝功能指标[总胆红素(TBIL)、谷丙转氨酶(ALT)、谷氨酰转肽酶(GGT)]、血清MMP-1、MMP-2、TIMP-1水平和不良反应发生情况。结果:研究组的临床总有效率高于对照组(P0.05)。结论:五灵胶囊联合富马酸丙酚替诺福韦片治疗CHB患者,可有效减轻机体氧化应激,调节CD4^(+)CD25^(+)调节性T细胞和血清MMP-1、MMP-2、TIMP-1水平。

关键词：五灵胶囊富马酸丙酚替诺福韦片慢性乙型肝炎氧化应激 CD4^(+)CD25^(+)调节性T细胞 MMP-1 MMP-2 TIMP-1

师范认证理念下分析化学实验课程项目式教学实践与评价研究——制作一份水质监测报告

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化学教育（中英文） 2024年第6期45卷 49-59页

作者：肖紫玫黎泓波王素琴姜建文江西师范大学化学化工学院化学国家级实验教学示范中心江西南昌330022

基于真实生活问题与分析化学实验的融合点对分析化学实验课程进行项目设计,以“制作一份水质监测报告”为例展示学生如何在沟通合作中实践四大滴定方法并解决真实问题,渗透“产出导向”理念;融入手持技术和误差理论,引导学生设计并完善... 详细信息

基于真实生活问题与分析化学实验的融合点对分析化学实验课程进行项目设计,以“制作一份水质监测报告”为例展示学生如何在沟通合作中实践四大滴定方法并解决真实问题,渗透“产出导向”理念;融入手持技术和误差理论,引导学生设计并完善实验方案,合理配置教学资源,贯彻“学生中心”理念;构建涵盖内容性考核和过程性考核的课程目标达成度评价体系,落实“持续改进”理念,促进化学师范专业学生达到毕业要求,切实提高人才培养质量。

关键词：师范教育认证分析化学实验项目式教学课程目标达成度